Lakhno VD. Pseudogap Isotope Effect as a Probe of Bipolaron Mechanism in High Temperature Superconductors.
MATERIALS (BASEL, SWITZERLAND) 2021;
14:4973. [PMID:
34501062 PMCID:
PMC8434434 DOI:
10.3390/ma14174973]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/05/2021] [Accepted: 08/28/2021] [Indexed: 11/17/2022]
Abstract
A theory of a pseudogap phase of high-temperature superconductors where current carriers are translation invariant bipolarons is developed. A temperature T* of a transition from a pseudogap phase to a normal one is calculated. For the temperature of a transition to the pseudogap phase, the isotope coefficient is found. It is shown that the results obtained, in particular, the possibility of negative values of the isotope coefficient, are consistent with the experiment. New experiments on the influence of the magnetic field on the isotope coefficient are proposed.
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